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A Layer Correlation technique for pion energy calibration at the 2004 ATLAS Combined Beam Test
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Number of Authors: 479
2011 (English)In: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 6, 06001- p.Article in journal (Refereed) Published
Abstract [en]

A new method for calibrating the hadron response of a segmented calorimeter is developed and successfully applied to beam test data. It is based on a principal component analysis of energy deposits in the calorimeter layers, exploiting longitudinal shower development information to improve the measured energy resolution. Corrections for invisible hadronic energy and energy lost in dead material in front of and between the calorimeters of the ATLAS experiment were calculated with simulated Geant4 Monte Carlo events and used to reconstruct the energy of pions impinging on the calorimeters during the 2004 Barrel Combined Beam Test at the CERN H8 area. For pion beams with energies between 20 GeV and 180 GeV, the particle energy is reconstructed within 3% and the energy resolution is improved by between 11% and 25% compared to the resolution at the electromagnetic scale.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2011. Vol. 6, 06001- p.
Keyword [en]
Calorimeter methods, Pattern recognition, cluster finding, calibration and fitting methods, Calorimeters, Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc)
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-85269DOI: 10.1088/1748-0221/6/06/P06001ISI: 000294492600001ScopusID: 2-s2.0-80053953132OAI: diva2:499835

QC 20120214 QC20160128

Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2016-01-28Bibliographically approved

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Lafaye, RemiLund-Jensen, Bengt
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